/*
 * Copyright © 2018 Yan Zhenjie.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.yanzhenjie.kalle.util;

import java.util.concurrent.Executor;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Created by YanZhenjie on 2018/2/26.
 */
public class WorkExecutor implements Executor {

    private static final int CPU_COUNT = Runtime.getRuntime().availableProcessors();

    private static final ThreadFactory THREAD_FACTORY = new ThreadFactory() {
        private final AtomicInteger mCount = new AtomicInteger(1);

        public Thread newThread(Runnable r) {
            return new Thread(r, "Request #" + mCount.getAndIncrement());
        }
    };

    private ThreadPoolExecutor mPoolExecutor;

    public WorkExecutor() {
        mPoolExecutor = new ThreadPoolExecutor(
                Math.max(2, Math.min(CPU_COUNT - 1, 4)),
                CPU_COUNT * 2 + 1,
                60L,
                TimeUnit.SECONDS,
                new LinkedBlockingQueue<Runnable>(128),
                THREAD_FACTORY);
        mPoolExecutor.allowCoreThreadTimeOut(true);
    }

    @Override
    public void execute(Runnable command) {
        mPoolExecutor.execute(command);
    }
}